Driving mechanism.



No. 810,817. PATENTED JAN. 16, 1906.

A. J. ALLISON.

DRIVING MEGHANISM.

APPLICATION FILED DEG.1,1904.

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ff/WM @5 72. @WMZ No. 810.317. PATENTED JAN. 16, 1906. A. J. ALLISON.DRIVING MECHANISM.

APPLIOATION FILED DEO.1,1904.

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W/w IIHH 46 55 47 @5 wi tnaoocn UNITED STATES PATENT onirica.

DRIVING NIECHANISM.

Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed December 1,1904. Serial No. 235,071.

T @ZZ whom t may concern:

Be it known that I, ANDREW J. ALLisON, a citizen of the United States,residing at Mount Sylvan, in the county of Smith, State of Texas, haveinvented certain new and useful Improvements in Driving Mechanisms; andI do hereby declarethe following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to driving mechanism, the object of the inventionbeing to provide a cheap, simple, and eflicient mechanism fortransforming reciprocatory motion into rotary motion.

A further object of the invention is to provide a driving mechanismwhich may be employed in connection with various mechanisms, there beingillustrated and described in the presen-t instance a single applicationor adaptation of the invention.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure l is an elevation showing a sewing machine stand or tableequipped with the present invention. Fig. 2 is a vertical section takentransversely through the lower portion of the sewing-machine table andillustrating the driving mechanism in elevation. Fig. 3 is a sectionsimilar to Fig. 2 through one of the pawls of the ratchet mechanism andshowing the fly-wheel and the other pawl with the connected levers inelevation and in a different position from that shown in Fig. 2. Fig. 4is a vertical section at right angles to Fig. 2 and including theiiy-wheel shaft and the shaft in the arm of the machine or needle-bar.

Referring now to the drawings, there is shown a part of the usual table10, having the supporting legs or uprights 11 and 12 and suitable braces13, there being a rock-shaft 14 journaled in the lower portions of thelegs and to which is attached the treadle 16.

' Mounted below the table 10 is a shaft 35, on

which are encircled by collars 41 and 42, re-

spectively, having arms 43 and 44, res ectively, which project atopposite sides o the hub. Between the collars 41 and 42 and the saidcam-faces are disposed balls 45 and 46, respectively, so that when thecollars are rotated in one direction the balls wedge between thecam-faces and the collar, and when they are rotated in the oppositedirection the balls roll out of wed ing positions and permit of movementof t e collars without moving the'hub and therewith the fly-wheel. Itwill be understood that if the arms 33 and 34 are drawn forwardly of themachine, so that they approach each other, one collar will be connectedwith the hub and vfly-wheel, and when the arms are moved in the oppositedirections,the other collar will be connected with the hub, so that thefly-wheel will be rotated continuously. To thus oscillate the collars, alever 47 is pivoted to a hanger 48, that depends from the table 10, andto the upper end of this lever is pivoted the stem 49 of a yokecomprising a rigid arm 50, pivoted to the outer end of the arm 43 and apivoted arm 5 1 which is pivoted to the outer end of the arm 44, so thatby reciprocating the yoke the collars 41 and 42 will be oscillatedoppositely. Pivoted to the lower end of the lever 47 is one link 53 of atoggle-lever comprisingalso a link 54, which is pivoted to the hanger43. A pitman 55 is pivoted to the link 54 and to the treadle 16, so thatas the treadle is rocked the connected ends of the toggle-links areraised and lowered. As the treadle is moved in one direction the pivotedends of the toggle-links are raised until the links aline, during whichmovement the lower end of the lever 47 is swung toward the front of themachine, thus serving to rotate the collars 41 and 42 in one direction.Continued movement of the treadle serves to break the toggle-leverupwardly'and the lever 47 is rocked in the opposite direction andoppositely moves the collars 41 and 42. In the opposite movement of thetreadle the toggle-lever is oppositely operated and one oscillation iscorrerespondingly given to the collars 41 and 42. Thus it will be seenthat when the treadle is rocked in one direction the ratchets areoperated once, and when the treadle is moved in ythe opposite directionthe ratchets are operated again, and consequently there are two pulls ofthe ratchets for each complete oscillation or rock ofthe treadle.

It will be understood that in practice modifications of the specificconstruction shown may be made and any suitable materials and IOOproportions may be used for the various parts without departing from thespirit of the invention.

What is claimed is 1. The combination with a driven member, of arock-leverI a ratchet mechanism connected with the driven member forrotat ing it, connections between the rock-lever and ratchet mechanismfor operating the latter, a toggle-lever connected at one end to therock-lever and at its opposite end to a 'fixed support, a treadle andconnections between the treadle and a link of the toggle-lever forshifting the links of the lever alternately from one side to the otherof their alining positions when the treadle is oscillated.

2. The combination with a rotatable driven member, of a rock lever, apair of ratchet mechanisms connected between /the rock-lever and thedriven member and adapted to alternately impart motion to the drivenmember as the lever is rocked, a toggle-lever connected at one end ofthe rock-lever and pivoted at its opposite end to a fixed support, atreadle and a connection between the treadle and one of the toggle-linksfor shifting said links from one side to the other of their aliningpositions.

In testimony whereof I affix my signature in presence oi two witnesses.

ANDREW J. ALLISON. Witnesses:

GONE JOHNSON, B. C. JOHNsoN.

